CN101915640B - Biaxial adaptive dynamic balance executing method for centrifuge - Google Patents

Biaxial adaptive dynamic balance executing method for centrifuge Download PDF

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CN101915640B
CN101915640B CN2010102422813A CN201010242281A CN101915640B CN 101915640 B CN101915640 B CN 101915640B CN 2010102422813 A CN2010102422813 A CN 2010102422813A CN 201010242281 A CN201010242281 A CN 201010242281A CN 101915640 B CN101915640 B CN 101915640B
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horn
signal
slide block
vibration
dynamic balance
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CN101915640A (en
Inventor
沈润杰
荣左超
何闻
贾叔仕
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Zhejiang University ZJU
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Zhejiang University ZJU
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Abstract

The invention discloses a biaxial adaptive dynamic balance executing method for a centrifuge. The method comprises the following steps of: installing a dynamic balance executing unit and an execution controller of the dynamic balance executing unit; converting the current rotation speed of a driving mechanism into a pulse sequence signal; setting a mark on a machine arm; acquiring a mismachining tolerance; acquiring a first vibration signal and the amplitude and phase of the first vibration signal; moving each slide block respectively and acquiring a second vibration signal and the amplitude and phase of the second vibration signal; calculating the primary unbalance of the machine arm by influence coefficient method; obtaining the needed moving direction and the needed moving distance of each slide block of the balance executing mechanism; and moving the slide blocks of the balance executing mechanism to a required position. The method of the invention has the advantages of realizing adaptive dynamic balance adjustment, along with accurate control.

Description

The two axial adaptive dynamic balance executing methods that are used for hydro-extractor
Technical field
The present invention relates to a kind of two axial adaptive dynamic balance executing methods that are used for hydro-extractor.
Technical background
At present, transient equilibrium work to centrifuge rotor is mostly finished on dynamic balancing machine, also some is to come centrifuge rotor is carried out transient equilibrium with dynamic balance technology, but these methods of eliminating unbalancing value all are eliminations or increase a part of quality, implementation procedure is very complicated, the needed time is also very long, and does transient equilibrium on the dynamic balancing machine again as long as the rotating speed of rotor or mass distribution change just rotor to be taken.
Summary of the invention
For overcoming the equilibrium process complexity of prior art, length consuming time, again do dynamically balanced shortcoming on the dynamic balancing machine as long as the rotating speed of rotor or mass distribution change just rotor to be taken, the invention provides the two axial adaptive dynamic balance executing methods that are used for hydro-extractor that a kind ofly directly are installed on the hydro-extractor, when the mass distribution of rotor or rotating speed change, can realize self-adaptation transient equilibrium adjustment.
The two axial adaptive dynamic balance executing methods that are used for hydro-extractor may further comprise the steps:
(1), the dynamic balance execution unit regulate its transient equilibrium mass respectively along both direction is installed on the horn of hydro-extractor, two to regulate directions vertical mutually;
(2), the current rotating speed that will drive the driving mechanism of horn rotation converts pulse sequence signal to, guarantees that horn whenever goes around, no matter horn rotating speed height, the umber of pulse in the pulse train is the same, the described pulse sequence signal of real time record;
(3), on horn, set a mark, make horn whenever go around, mark sends a pulse signal, and the position of mark is on a slide block moving direction; And stipulate that the centre of gyration with horn is an initial point, the line of described mark and described initial point is
Figure 775DEST_PATH_IMAGE001
Axle, the direction from described initial point to described mark is
Figure DEST_PATH_IMAGE002
To, and find according to the right-hand rule
Figure 291816DEST_PATH_IMAGE003
The axle and
Figure DEST_PATH_IMAGE004
To;
(4), hydro-extractor before coming into operation, need obtain the mismachining tolerance curve of horn, and described mismachining tolerance curve is preserved as systematic error; Horn is changeed under extremely low rotating speed
Figure 946920DEST_PATH_IMAGE005
Change, make the size of the vibration that unbalancing value causes be almost 0, with the external clock signal of current pulse sequence signal as data collecting card, the pulse signal that sends with mark is as the trigger pip of data collecting card, described horn mismachining tolerance curve is carried out integer-period sampled, the revolution that the sampling horn rotates is
Figure 279812DEST_PATH_IMAGE005
, horn is whenever goed around, and data collecting card is integer-period sampled
Figure DEST_PATH_IMAGE006
Individual, acquisition causes the mismachining tolerance curve of horn
Figure 462226DEST_PATH_IMAGE007
(
Figure DEST_PATH_IMAGE008
), write down described mismachining tolerance curve;
(5), make centrifuge treating in normal operating conditions, obtain first vibration signal that the amount of unbalance of horn causes, with the external clock signal of current pulse sequence signal as data collecting card, the pulse of sending with mark is as the trigger pip of data collecting card, to described first vibration signal sampling, the same in the revolution that the sampling horn rotates and the sampling number of revolution and the step (4), be respectively
Figure 160055DEST_PATH_IMAGE005
With , obtain first vibration response curve
Figure 999890DEST_PATH_IMAGE009
(
Figure 606452DEST_PATH_IMAGE008
); Remove the mismachining tolerance in first vibration response curve
Figure DEST_PATH_IMAGE010
( ),
Amplitude and phase place that utilization is eliminated undesired signal and obtained first vibration response curve from motion tracking correlation filtering method are respectively:
Figure DEST_PATH_IMAGE012
(6), move respectively ,
Figure 801493DEST_PATH_IMAGE003
The slide block of the dynamic balance execution unit axially, and write down the displacement that two axial top shoes move and be respectively
Figure 667555DEST_PATH_IMAGE001
,
Figure 846864DEST_PATH_IMAGE003
If wherein displacement moves to positive dirction for just representing, for negative indication moves to negative direction;
Obtain second vibration signal that the current amount of unbalance of horn causes, with the external clock signal of current pulse sequence signal as data collecting card, described second vibration signal is sampled as the trigger pip of data collecting card with the pulse that mark sends, the same in the revolution that the sampling horn rotates and the sampling number of revolution and the step (4), be respectively
Figure 59670DEST_PATH_IMAGE005
With
Figure 640824DEST_PATH_IMAGE006
, obtain second vibration response curve
Figure 418069DEST_PATH_IMAGE013
(
Figure 84673DEST_PATH_IMAGE008
); Remove the mismachining tolerance in second vibration response curve
Figure DEST_PATH_IMAGE014
(
Figure 38854DEST_PATH_IMAGE008
), utilize amplitude and the phase place eliminating undesired signal and obtain second vibration response curve from the relevant filter method of motion tracking to be respectively:
Figure 973050DEST_PATH_IMAGE015
Figure DEST_PATH_IMAGE016
(7), the amplitude and the phase place of first, second vibration response curve of drawing according to step (5) and step (6), and the moving direction of each slide block and displacement, use influence coefficient method to calculate the original unbalance of horn:
Figure 682380DEST_PATH_IMAGE017
According to described original unbalance, and get its being projected as on two slide block moving directions respectively , , promptly
Figure DEST_PATH_IMAGE020
, being derived as direction and distance that the slide block that makes hydro-extractor reach transient equilibrium, each dynamic balance execution mechanism need move, computing formula is as follows:
Figure 764791DEST_PATH_IMAGE021
，
Figure DEST_PATH_IMAGE022
Wherein
Figure 992641DEST_PATH_IMAGE023
For just represent to
Figure 371408DEST_PATH_IMAGE002
Direction moves, for negative indication to
Figure DEST_PATH_IMAGE024
Direction moves,
Figure 684708DEST_PATH_IMAGE025
For just represent to Direction moves, for negative indication to
Figure DEST_PATH_IMAGE026
Direction moves; x, yBe two displacements that slide block moves in the step (6); mBe the movable part quality, movable part comprises slide block, feed screw nut, transient equilibrium mass and connects the bolt and nut of usefulness;
(8), make the slide block of each dynamic balance execution mechanism move to the position of requirement; Obtain the current vibratory response of hydro-extractor, judge whether current vibration is in the vibration allowed band, if, the position that then keeps each slide block; If not, then return step (5).
Further, in the step (8), before moving slider, judge whether slide block can be moved to outside the guide rail earlier: if then send warning, and prompting can't be finished transient equilibrium; If not, moving slider then.
Technical conceive of the present invention is: by dynamic balance execution unit is installed, obtain the adjustment parameter of dynamic balance execution unit by the vibratory response that is caused by unbalance mass, of analyzing horn on horn, make horn reach transient equilibrium.When the rotating speed of horn and mass distribution changed, the vibratory response of horn also changed accordingly, and processor will reanalyse, calculate vibratory response, re-move the slide block of dynamic balance execution mechanism, make horn reach transient equilibrium again.
The present invention has and directly is installed on the hydro-extractor, can realizes self-adaptation transient equilibrium adjustment, the advantage of precise control when the mass distribution of rotor or rotating speed change.
Description of drawings
Fig. 1 is a synoptic diagram of the present invention.
Fig. 2 is that two dynamic balance execution unit are installed on the synoptic diagram on the horn.
Fig. 3 is the cut-open view of dynamic balance execution unit.
Fig. 4 is a control flow chart of the present invention.
Embodiment
With reference to accompanying drawing, further specify the present invention:
The two axial adaptive dynamic balance executing methods that are used for hydro-extractor may further comprise the steps:
(1), the dynamic balance execution unit regulate its transient equilibrium mass respectively along both direction is installed on the horn of hydro-extractor, two to regulate directions vertical mutually;
(2), the current rotating speed that will drive the driving mechanism of horn rotation converts pulse sequence signal to, guarantees that horn whenever goes around, no matter horn rotating speed height, the umber of pulse in the pulse train is the same, the described pulse sequence signal of real time record;
(3), on horn, set a mark, make horn whenever go around, mark sends a pulse signal, and the position of mark is on a slide block moving direction; And stipulate that the center with horn is an initial point, the line of described mark and described initial point is
Figure 969375DEST_PATH_IMAGE001
Axle, the direction from described initial point to described mark is
Figure 20507DEST_PATH_IMAGE002
To, and find according to the right-hand rule
Figure 883421DEST_PATH_IMAGE003
The axle and
Figure 45412DEST_PATH_IMAGE004
To;
(4), hydro-extractor before coming into operation, need obtain the mismachining tolerance curve of horn, and described mismachining tolerance curve is preserved as systematic error; Horn is changeed under extremely low rotating speed Change, make the size of the vibration that unbalancing value causes be almost 0, with the external clock signal of current pulse sequence signal as data collecting card, the pulse signal that sends with mark is as the trigger pip of data collecting card, described horn mismachining tolerance curve is carried out integer-period sampled, the revolution that the sampling horn rotates is , horn is whenever goed around, and data collecting card is integer-period sampled
Figure 115371DEST_PATH_IMAGE006
Individual, acquisition causes the mismachining tolerance curve of horn
Figure 81053DEST_PATH_IMAGE007
(
Figure 698854DEST_PATH_IMAGE008
), write down described mismachining tolerance curve;
(5), make centrifuge treating in normal operating conditions, obtain first vibration signal that the amount of unbalance of horn causes, with the external clock signal of current pulse sequence signal as data collecting card, the pulse of sending with mark is as the trigger pip of data collecting card, to described first vibration signal sampling, the same in the revolution that the sampling horn rotates and the sampling number of revolution and the step (4), be respectively
Figure 826210DEST_PATH_IMAGE005
With
Figure 663716DEST_PATH_IMAGE006
, obtain first vibration response curve
Figure 167510DEST_PATH_IMAGE009
( ); Remove the mismachining tolerance in first vibration response curve
Figure 203653DEST_PATH_IMAGE010
(
Figure 528456DEST_PATH_IMAGE008
),
Amplitude and phase place that utilization is eliminated undesired signal and obtained first vibration response curve from motion tracking correlation filtering method are respectively:
Figure 835940DEST_PATH_IMAGE011
Figure 726536DEST_PATH_IMAGE012
Move the slide block of each dynamic balance execution unit, and write down the displacement that two slide block moving direction top shoes move and be respectively (6), respectively
Figure 965668DEST_PATH_IMAGE001
,
Figure 512187DEST_PATH_IMAGE003
If wherein displacement moves to positive dirction for just representing, for negative indication moves to negative direction;
Obtain second vibration signal that the current amount of unbalance of horn causes, with the external clock signal of current pulse sequence signal as data collecting card, described second vibration signal is sampled as the trigger pip of data collecting card with the pulse that mark sends, the same in the revolution that the sampling horn rotates and the sampling number of revolution and the step (4), be respectively
Figure 623363DEST_PATH_IMAGE005
With
Figure 571727DEST_PATH_IMAGE006
, obtain second vibration response curve
Figure 975901DEST_PATH_IMAGE013
(
Figure 9716DEST_PATH_IMAGE008
); Remove the mismachining tolerance in second vibration response curve
Figure 659003DEST_PATH_IMAGE014
(
Figure 461874DEST_PATH_IMAGE008
), utilize amplitude and the phase place eliminating undesired signal and obtain second vibration response curve from motion tracking correlation filtering method to be respectively:
Figure 36950DEST_PATH_IMAGE015
(7), the amplitude and the phase place of first, second vibration response curve of drawing according to step (5) and step (6), and the moving direction of each slide block and displacement, use influence coefficient method to calculate the original unbalance of horn:
Figure 745460DEST_PATH_IMAGE017
According to described original unbalance, and get its being projected as on two slide block moving directions respectively
Figure 668417DEST_PATH_IMAGE018
,
Figure 414394DEST_PATH_IMAGE019
, promptly
Figure 422801DEST_PATH_IMAGE020
, being derived as direction and distance that the slide block that makes hydro-extractor reach transient equilibrium, each dynamic balance execution mechanism need move, computing formula is as follows:
Figure 476207DEST_PATH_IMAGE021
，
Wherein
Figure 672014DEST_PATH_IMAGE023
For just represent to
Figure 394814DEST_PATH_IMAGE002
Direction moves, for negative indication to Direction moves,
Figure 821564DEST_PATH_IMAGE025
For just represent to
Figure 410808DEST_PATH_IMAGE004
Direction moves, for negative indication to
Figure 892343DEST_PATH_IMAGE026
Direction moves; x, yBe two displacements that slide block moves in the step (6); mBe the movable part quality, movable part comprises slide block, feed screw nut, transient equilibrium mass and connects the bolt and nut of usefulness;
(8), make the slide block of each dynamic balance execution mechanism move to the position of requirement; Obtain the current vibratory response of hydro-extractor, judge whether current vibration is in the vibration allowed band, if, the position that then keeps each slide block; If not, then return step (5).
In the step (8), before moving slider, judge whether slide block can be moved to outside the guide rail earlier: if then send warning, and prompting can't be finished transient equilibrium; If not, moving slider then.
Be used to realize the dynamic balance execution device of above-mentioned manner of execution, comprise on the horn 1 that is fixed in hydro-extractor, regulate the dynamic balance execution unit 2 and the implementation controller 7 of its transient equilibrium mass respectively along both direction, described dynamic balance execution unit 2 comprises the base 21 that is fixed on the described horn 1, be fixed on the guide rail 22 on the described base 21, the slide block 23 that is slidingly connected with described guide rail 22 and promote described slide block 23 along described guide rail 22 reciprocating gear trains, on described transient equilibrium the mass 24 affixed and described slide blocks 23, two adjusting directions of described dynamic balance execution unit 2 are vertical; Dynamic balance execution unit 2 is controlled by described implementation controller 7.
Described horn 1 is outer to be provided with the data collector of the periodic vibration response of the horn 1 that collection causes by amount of unbalance, the amplitude that described data collector and can obtain the vibratory response that different aequums causes and phase place and original unbalance and the moving direction of each slide block and the processor 3 of displacement of calculating horn according to described amplitude and phasometer are connected, described processor 3 is by wireless communication apparatus 6 and 7 communications of described implementation controller, and wireless communication apparatus 6 uses RS232 and 3 communications of described processor.
The guide rail 22 that described horn 1 is provided with 2, two dynamic balance execution unit 2 of two dynamic balance execution unit is vertical mutually.
Described harvester comprises on the rotary drive mechanism that is arranged on described horn 1, the rotating speed of rotary drive mechanism can be converted to the photoelectric encoder 41 of pulse sequence signal, the data collecting card 42 that is connected with described photoelectric encoder 41 is connected with described data collecting card 42 and responds to the trigger mechanism whether horn 1 vibrates and obtain the vibration transducer 43 of vibration signal and trigger described data collecting card 42, make it begin to sample;
With the pulse sequence signal of described photoelectric encoder 41 outputs external clock signal as data collecting card 42, with the vibration signal of described vibration transducer 43 outputs input signal as data collecting card 42, the sampled signal that will obtain after will sampling to described vibration signal according to described external clock signal is as the output signal of described data collecting card 42, and described sampled signal is imported in the described processor 3.
Described vibration transducer 43 is a current vortex sensor.
Described trigger mechanism comprise be fixed on the described horn, with the magnet steel 441 and the Hall switch 442 that is connected with described data collecting card 42 of the guide rail conllinear of arbitrary dynamic balance execution unit, described horn 1 is whenever goed around, described Hall switch 442 meets once with described magnet steel 441, and the described data collecting card 42 of trigger action that described Hall switch 442 sends when meeting with described magnet steel 441 is sampled.
Described processor 3 comprises when horn slowly runs, obtain and write down the systematic error logging modle of the mismachining tolerance curve of horn, when horn 1 operate as normal, obtain and write down first cache module of first vibration signal of horn 1 generation, the slide block of each performance element is moved, and the execution module of record slide block moving direction and distance, after obtaining and write down slide block 23 and moving, second cache module of second vibration signal that horn 1 produces, respectively with first, mismachining tolerance in second vibration signal is removed, and the filtering interfering noise signal, obtain the error module of going of the amplitude of vibration signal and phase place, according to first, the quality of the amplitude of second vibration signal and phase place and slide block and displacement, calculate the original unbalance of horn with influence coefficient method, and described original unbalance is converted to the slide block 23 required mobile directions of each topworks and the computing module of distance, with the communication module of described implementation controller communication, required mobile direction of slide block that described computing module obtains and distance are transferred to described implementation controller 7 by communication module.
Described gear train comprises stepper motor 251 and screw mechanism, and leading screw 252 is connected with the output shaft of described motor 251, and feed screw nut 253 and described mass 24 are affixed; The both sides of described leading screw 252 are provided with the limit switch 254 of restriction slide block moving range respectively, the two ends of described leading screw are connected with base 21 by supporting base 255 respectively, be provided with bearing 256 between described supporting base 255 and the described screw mandrel 254, described supporting base 255 is fixed in described base 21; Described stepper motor 251 is controlled by described implementation controller.
Described rotary drive mechanism comprises and the gear mechanism that drives described horn 1 rotation, gear wheel 51 and described horn 1 are affixed, pinion wheel 52 and described gear wheel 51 engaged transmission, pinion wheel 52 and the drive motor interlock that power is provided, described photoelectric encoder 41 is installed in the rotating shaft 53 of described pinion wheel 52.
Described processor 3 is by wireless communication apparatus 6 and 7 communications of described implementation controller, and wireless communication apparatus 6 uses RS232 and 3 communications of described processor.
Technical conceive of the present invention is: by dynamic balance execution unit 2 is installed, obtain the adjustment parameter of dynamic balance execution unit 2 by the vibratory response that is caused by amount of unbalance of analyzing horn 1 on horn, make horn 1 reach transient equilibrium.When the rotating speed of horn 1 and mass distribution changed, the vibratory response of horn 1 also changed accordingly, and processor 3 will reanalyse, calculate vibratory response, re-move the slide block 23 of dynamic balance execution mechanism 2, make horn 1 reach transient equilibrium again.
The trigger pip that the present invention uses Hall switch to begin image data as the phase reference and the data collecting card of dynamic balancing measurement.During rotor rotation, what Hall switch was exported at ordinary times is high level, when meeting with magnet steel with output low level, so horn is whenever goed around, pulse of Hall switch output, this pulse inputs to capture card, and its rising edge begins the reference signal of image data as data collecting card; During the driving mechanism action, the power of drive motor is through pinion wheel, and gear wheel is passed to horn, thereby horn is rotated; The photoelectric encoder that is connected in the pinion wheel rotating shaft is converted to pulse train output with the rotating speed of pinion wheel rotating shaft, this pulse train inputs to data collecting card, external clock signal as the data collecting card sampling, no matter guarantee rotor rotating speed size, horn is whenever goed around, and data collecting card is integer-period sampled Individual, and the stationkeeping of sampled point.Having under the situation of amount of unbalance, rotor has periodic vibration, and upper and lower current vortex sensor is installed in the outside of rotor, rely on to detect the vibratory response to amount of unbalance that the gap variable quantity of itself and rotor is measured rotor; The output signal of upper and lower current vortex sensor inputs to data collecting card, as the input signal of data collecting card; Data collecting card starts after receiving the reference signal pulse, enters the state of preparing sampling, whenever receives an external clock signal pulse afterwards and gathers an input signal, has gathered
Figure 711711DEST_PATH_IMAGE027
Individual back transfers data to computing machine by usb bus, finishes data acquisition one time.
Because the horn diameter of hydro-extractor is bigger, circularity after machining can not be fine, horn when rotated, vibration response curve same frequency and initial phase that the mismachining tolerance curve and the amount of unbalance of horn cause are identical, so before hydro-extractor comes into operation, the mismachining tolerance curved measurement of horn should be come out and its intrinsic reference record as system is got off; The method that obtains horn mismachining tolerance curve is: horn is changeed under extremely low rotating speed
Figure 737436DEST_PATH_IMAGE005
Change, make the size of unbalancing value be almost 0, system is through behind the data acquisition mentioned above, and data collecting card will collect the mismachining tolerance curve of horn, and be transferred to processor.When calculating the amount of unbalance of horn, earlier the mismachining tolerance in the vibration signal is removed, improve the accuracy of control.
Data collecting card is all gathered pivoted arm at every turn
Figure 440688DEST_PATH_IMAGE005
The signal of individual turn over, horn is whenever goed around, and data collecting card is integer-period sampled
Figure 639588DEST_PATH_IMAGE006
Individual, horn mismachining tolerance curve is
Figure 980570DEST_PATH_IMAGE007
(
Figure 177197DEST_PATH_IMAGE008
), first vibration signal is
Figure 869209DEST_PATH_IMAGE009
( ), second vibration signal (
Figure 871035DEST_PATH_IMAGE008
), regulation is an initial point with the centre of gyration of horn, the line of described mark and described initial point is
Figure 784764DEST_PATH_IMAGE001
Axle, the direction from described initial point to described mark is
Figure 767545DEST_PATH_IMAGE002
To, and find according to the right-hand rule
Figure 348699DEST_PATH_IMAGE003
The axle and Quality to movable part is
Figure DEST_PATH_IMAGE028
, movable part comprises the bolt and nut of transient equilibrium mass, feed screw nut, slide block and connection usefulness;
(1) eliminate mismachining tolerance, obtain because the vibration signal that amount of unbalance causes:
（ ）
Figure 238846DEST_PATH_IMAGE014
（
Figure 682597DEST_PATH_IMAGE008
）
(2) use from motion tracking correlation filtering method and eliminate undesired signal and obtain the vibration amplitude and the phase place of first vibration signal of horn:
If the expression formula of first vibration signal is ( ), wherein Be unbalanced signal, Be interfering noise signal;
If
Figure DEST_PATH_IMAGE032
,
Figure 699521DEST_PATH_IMAGE033
(
Figure 75139DEST_PATH_IMAGE008
)
Figure DEST_PATH_IMAGE034
Figure 371122DEST_PATH_IMAGE035
Right
Figure DEST_PATH_IMAGE036
,
Figure 47671DEST_PATH_IMAGE037
From
Figure 895542DEST_PATH_IMAGE008
Summation:
Figure DEST_PATH_IMAGE038
Figure 696138DEST_PATH_IMAGE039
Right
Figure DEST_PATH_IMAGE040
, wherein
Figure 294348DEST_PATH_IMAGE041
, under abundant situation of sampling period
Figure DEST_PATH_IMAGE042
,
Figure 496790DEST_PATH_IMAGE043
Right , wherein
Figure 217359DEST_PATH_IMAGE045
, under abundant situation of sampling period
Figure DEST_PATH_IMAGE046
,
Figure 505252DEST_PATH_IMAGE047
So
Figure DEST_PATH_IMAGE048
,
Figure 641573DEST_PATH_IMAGE049
So
Figure DEST_PATH_IMAGE050
,
Figure 698522DEST_PATH_IMAGE051
So the vibration amplitude and the phase place of first vibration signal are respectively
Figure DEST_PATH_IMAGE052
Figure 91457DEST_PATH_IMAGE012
Similarly, use vibration amplitude and the phase place of eliminating undesired signal and obtaining second vibration signal of horn from motion tracking correlation filtering method mentioned above to be respectively:
Figure 433358DEST_PATH_IMAGE053
(3) use influence coefficient method to calculate the amount of unbalance of horn:
Can be write first, second vibration signal as vector form:
Figure DEST_PATH_IMAGE054
，
Figure 848607DEST_PATH_IMAGE055
If the amount of unbalance of horn is when initial
Figure DEST_PATH_IMAGE056
, corresponding vibration response signal is first vibration signal
Figure 910978DEST_PATH_IMAGE057
, if amount of unbalance to the influence coefficient of vibratory response is
Figure DEST_PATH_IMAGE058
, then
Figure 173464DEST_PATH_IMAGE059
（1）
The slide block moving displacement of dynamic balance execution unit
Figure DEST_PATH_IMAGE060
(wherein For
Figure 745445DEST_PATH_IMAGE001
Slide block displacement on the axle,
Figure 480183DEST_PATH_IMAGE003
For
Figure 26702DEST_PATH_IMAGE003
Slide block displacement on the axle, x, yMove to positive dirction for just representing, for negative indication moves to negative direction),
Figure 200194DEST_PATH_IMAGE028
Be the movable part quality, movable part comprises slide block, feed screw nut, transient equilibrium mass and connects the bolt and nut of usefulness, then what move the generation amount of unbalance owing to slide block is
Figure 647094DEST_PATH_IMAGE061
, keep test speed constant, then Ci Shi vibration response signal is second vibration signal:
Figure DEST_PATH_IMAGE062
(2)
Can get by (1) and (2)
Figure 490416DEST_PATH_IMAGE063
(3)
So can get original unbalance by (1) and (3) is:
Figure DEST_PATH_IMAGE064
(4) displacement and the direction of two stepper motors of calculating;
If initial unbalance,
Figure 338298DEST_PATH_IMAGE001
The axle and Component on the axle is respectively ,
Figure 66717DEST_PATH_IMAGE019
, then the initial unbalance, vector can be converted into plural form:
Figure 752651DEST_PATH_IMAGE065
Then
Figure 675607DEST_PATH_IMAGE001
Direction and
Figure 923049DEST_PATH_IMAGE003
The distance that slide block on the direction need move is respectively
Figure 931456DEST_PATH_IMAGE023
,
Figure 421081DEST_PATH_IMAGE025
, and
，
Figure 198544DEST_PATH_IMAGE067
Wherein
Figure 616887DEST_PATH_IMAGE023
For just represent to
Figure 847012DEST_PATH_IMAGE002
Direction moves, for negative indication to
Figure 140327DEST_PATH_IMAGE024
Direction moves,
Figure 772297DEST_PATH_IMAGE025
For just represent to
Figure 361541DEST_PATH_IMAGE004
Direction moves, for negative indication to
Figure 344541DEST_PATH_IMAGE026
Direction moves.
The described content of this instructions embodiment only is enumerating the way of realization of inventive concept; protection scope of the present invention should not be regarded as only limiting to the concrete form that embodiment states, protection scope of the present invention also reach in those skilled in the art conceive according to the present invention the equivalent technologies means that can expect.

Claims (2)

1. the two axial adaptive dynamic balance executing methods that are used for hydro-extractor may further comprise the steps:
(1), the dynamic balance execution unit regulate its transient equilibrium mass respectively along both direction is installed on the horn of hydro-extractor, two to regulate directions vertical mutually;
(2), the current rotating speed that will drive the driving mechanism of horn rotation converts pulse sequence signal to, guarantees that horn whenever goes around, no matter horn rotating speed height, the umber of pulse in the pulse train is the same, the described pulse sequence signal of real time record;
(3), on horn, set a mark, make horn whenever go around, mark sends a pulse signal, and the position of mark is on a slide block moving direction; And regulation is initial point with the centre of gyration of horn, and the line of described mark and described initial point is the x axle, the direction from described initial point to described mark be+x to, and according to the right-hand rule find y axle and+y to;
(4), hydro-extractor before coming into operation, need obtain the mismachining tolerance curve of horn, and described mismachining tolerance curve is preserved as systematic error; Make horn under extremely low rotating speed, change N TChange, make the size of the vibration that unbalancing value causes be almost 0, with the external clock signal of current pulse sequence signal as data collecting card, the pulse signal that sends with mark is as the trigger pip of data collecting card, described horn mismachining tolerance curve is carried out integer-period sampled, the revolution that the sampling horn rotates is N T, horn is whenever goed around, the integer-period sampled N of data collecting card SIndividual, acquisition causes the mismachining tolerance curve z of horn 3(n) (n=1,2,--, N TN S), write down described mismachining tolerance curve;
(5), make centrifuge treating in normal operating conditions, obtain first vibration signal that the unbalancing value of horn causes, with the external clock signal of current pulse sequence signal as data collecting card, the pulse signal that sends with mark is as the trigger pip of data collecting card, to described first vibration signal sampling, the same in the revolution that the sampling horn rotates and the sampling number of revolution and the step (4), be respectively N TAnd N S, obtain the first vibration response curve z 1(n) (n=1,2,--, N TN S); Remove the mismachining tolerance curve x in first vibration response curve 1(n)=z 1(n)-z 3(n) (n=1,2,--, N TN S),
Amplitude and phase place that utilization is eliminated undesired signal and obtained first vibration response curve from motion tracking correlation filtering method are respectively:
A 1 = [ 2 Σ n = 1 N T N S x 1 ( n ) cos ( 2 π N S · n ) / ( N T N S ) ] 2 + [ 2 Σ n = 1 N T N S x 1 ( n ) sin ( 2 π N S · n ) / ( N T N S ) ] 2
Figure FDA0000085787770000022
(6), the slide block of mobile x, the y dynamic balance execution unit on axially respectively, and write down the displacement that two axial top shoes move and be respectively x, y, if wherein displacement moves to positive dirction for just representing, for negative indication moves to negative direction;
Obtain second vibration signal that the current unbalancing value of horn causes, with the external clock signal of current pulse sequence signal as data collecting card, described second vibration signal is sampled as the trigger pip of data collecting card with the pulse that mark sends, the same in the revolution that the sampling horn rotates and the sampling number of revolution and the step (4), be respectively N TAnd N S, obtain the second vibration response curve z 2(n) (n=1,2,--, N TN S); Remove the mismachining tolerance curve x in second vibration response curve 2(n)=z 2(n)-z 3(n) (n=1,2,--, N TN S), utilize amplitude and the phase place eliminating undesired signal and obtain second vibration response curve from motion tracking correlation filtering method to be respectively:
A 2 = [ 2 Σ n = 1 N T N S x 2 ( n ) cos ( 2 π N S · n ) / ( N T N S ) ] 2 + [ 2 Σ n = 1 N T N S x 2 ( n ) sin ( 2 π N S · n ) / ( N T N S ) ] 2
Figure FDA0000085787770000032
(7), the amplitude and the phase place of first, second vibration response curve of drawing according to step (5) and step (6), and the moving direction of each slide block and displacement, use influence coefficient method to calculate the original unbalance of horn:
Figure FDA0000085787770000033
According to described original unbalance, and get it respectively and on two slide block moving directions, be projected as U x, U y, i.e. U=U x+ jU y, being derived as direction and distance that the slide block that makes hydro-extractor reach transient equilibrium, each dynamic balance execution unit need move, computing formula is as follows:
d x = U x m - x , d y = U y m - y
D wherein xFor just representing to move, for negative indication moves d to-x direction to+x direction yFor just representing to move, for negative indication moves to-y direction to+y direction; X, y are two displacements that slide block moves in the step (6); M is the movable part quality, and movable part comprises slide block, feed screw nut, transient equilibrium mass and connects the bolt and nut of usefulness;
(8), make the slide block of each dynamic balance execution unit move to the position of requirement; Obtain the current vibratory response of hydro-extractor, judge whether current vibration is in the vibration allowed band, if, the position that then keeps each slide block; If not, then return step (5).
2. the two axial adaptive dynamic balance executing methods that are used for hydro-extractor as claimed in claim 1, it is characterized in that: in the step (8), before moving slider, judge whether slide block can be moved to outside the guide rail earlier: if, then send warning, and prompting can't be finished transient equilibrium; If not, moving slider then.
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